You try to resist, but there's nothing to be done for it as you start to change. At first it only tingles, but then it grows painful. You writhe back and forth on the table, unintentionally providing Wydia with more stimulation and eliciting a smile and a pleasure sound from her. She moans all the louder when suddenly your cock shoots out to an absurd length inside of her.
"Oh my! Becoming quite the big boy are we?" she says. "A horse perhaps?"
In pain your fingernails scrape the wood of the table, no, they dig into the table. You have claws? Horses didn't have claws, but yes you have, long cutting claws, and sharp teeth! Fur is beginning to grow over your body, but you wonder if you can use your claws to cut the rope and escape.
"Oh, not a horse? My but you look to be turning out very special indeed," she says, "I was right about you then. Oh you are going to be my favorite new toy."
Then you begin to grow, adding muscle upon muscle until you could put a body builder to shame, and in doing so you snap your bonds. You're free! You try to take a swipe at her throat with your new claws, but your arm doesn't respond to your command. She laughs evily. "I told you that you were my slave now, did I not? You're quite incapable of any rebellious actions, and your every thought is known to me. There is no escape my little pet." Then one of your pain spasms causes you to thrust into her rather powerfully, lifting her off the ground. Her eyes widen in shock and pleasure, but she rides you back down. "Ok ok, my BIG pet." She says, looking a little flustered.
At last the pain stops and you lay there panting. She beams at you with satisfaction. "Oh you're absolutely magnificent! Anyway, you should see your new self my pet." She dismounts you, leaving your wet dick pointing to heaven, and you get a look at it. It's huge and does indeed look like a horse dick, but the rest of you isn't a horse... She waves a hand and a mirror appears. Then she orders you to stand and you are compelled to obey. "Come take a look dear!"
You nervously come before the mirror and behold yourself, but you aren't sure what it is that you're seeing. "What...what am I?" you ask.
"Why, you're a chimera dear, the rarest familiar of all, and in your case apparently one perfectly crafted for my needs. The strength of a tiger..." her hands gently tease your muscled abs, which are indeed striped orange and black, "The lust of a rabbit," she says as she pulls on your fluffy tail, "The stamina of a horse," she says as she gently lifts your great cock in her dainty hand, "and of course, the obedience of a loyal dog." she says as she scratches behind your floppy ears, which you can't help but admit feels amazing, even fills you with submissive feelings towards her... In spite of yourself you let out a dog-like whine.
She sighs happily. "Perfection. In fact I'm tempted to keep you in this half-human state just for aesthetics and pleasure's sake, but you would provide more magic if I changed you fully into an animal. Hmm decisions, decisions... "